Foot per Second (ft/s)
Feet per second is used in US engineering, ballistics and physics problems. 88 ft/s is exactly 60 mph, and sound in air travels about 1125 ft/s.
Symbol: ft/s
Quantity: speed (distance per time)
SI relation: 1 ft/s = 0.3048 m/s (exact)
Derivation: 1 ft/s = 0.3048 m/s exactly.
Exact: yes, by definition
Typical uses
- Muzzle velocity and ballistics
- US physics and engineering problems
- Fluid velocity in pipes
Convert feet per second to other units
| Conversion | 1 ft/s equals | Reverse |
|---|---|---|
| foot per second to meter per second | 0.3048 m/s | meter per second to foot per second |
| foot per second to kilometer per hour | 1.09728 km/h | kilometer per hour to foot per second |
| foot per second to mile per hour | 0.6818181818 mph | mile per hour to foot per second |
| foot per second to knot | 0.5924838013 kn | knot to foot per second |
Open the Speed Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot per second".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Foot per Second (ft/s). Retrieved October 25, 2026, from https://scientificconverters.com/units/foot-per-second/
IEEE
Scientific Converters, "Foot per Second (ft/s)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/foot-per-second/